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SUMMARY:Status and perspectives of (alpha\,n) reactions measurements at CN
 A HiSPANoS
DTSTART;VALUE=DATE-TIME:20241119T153700Z
DTEND;VALUE=DATE-TIME:20241119T154400Z
DTSTAMP;VALUE=DATE-TIME:20260424T154029Z
UID:indico-contribution-25478@indico.ific.uv.es
DESCRIPTION:Speakers: Carlos Guerrero (Universidad de Sevilla)\nNeutron em
 itted in nuclear reactions following the absorption of alpha particles pla
 y a key role in several fields of research: acting as neutron source in th
 e s-process\, affecting the production of elements in the r-process occurr
 ing in the neutron driven winds of core-collapse supernova\, inducing back
 ground signals in underground dark matter search experiments\, or being a 
 proxy for active interrogation of nuclear materials. Accordingly\, there i
 s a renewed interest in measuring the yields and energy spectra of (alpha\
 ,n) reactions on many isotopes (see. Ref. [1] for a recent overview of the
  scientific cases and a summary of the reactions of interest in the mentio
 ned fields of research). In this context\, the Spanish experimental nuclea
 r physics community has established the MANY (Measurements of Alpha-N Yiel
 ds) Collaboration to measure (alpha\,n) reactions at two different acceler
 ator facilities (CNA HiSPANoS [2\,3] and CMAM [4]) using three complementa
 ry detectors for assessing the corresponding neutron yields (miniBELEN [5]
  and GARY [6]) and energy spectra (MONSTER [7]).\n \nThe CNA HiSPANoS faci
 lity is driven by a 3 MV tandem accelerator delivering both continuous and
  pulsed (2% duty cycle) beams of proton/deuteron up to 6 MeV and alphas up
  to 9 MeV. The current source of alphas is a NEC-ALPHATROSS model deliveri
 ng a maximum current of only 2 uA\, and the pulsing systems is only design
 ed and optimized for protons and deuterons\, hence performing poorly for a
 lpha beams. This configuration is well suited for activation and neutron c
 ounting experiments with miniBELEN\, which shall start in early 2025\, and
  the results from preliminary measurements on 27Al(alpha\,n) by ToF using 
 the pulsed beam and a single MONSTER neutron detector module are promising
 . However\, the limitations in beam current and pulsing performance have c
 alled for a major upgrade. First\, a more versatile buncher system is curr
 ently being designed by NEC and \n\nhttps://indico.ific.uv.es/event/7664/c
 ontributions/25478/
LOCATION:
URL:https://indico.ific.uv.es/event/7664/contributions/25478/
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